“…1 The usual clinical appearance of this group is an erythematous maculopapular rash, but sometimes macular, vesicular, petechial, purpuric, or urticarial reactions may be seen. In addition to these four families, exanthems can occur in the course of infections with the following families: Adenoviridae, Reoviridae, 4 Togaviridae, Flaviviridae, Retroviridae, Parvoviridae, Paramyxoviridae, Arenaviridae, Filoviridae, and Bunyaviridae. 2 Some of the varied manifestations of viral diseases may result from an immune reaction to the virus.…”